Giovanni de Gamerra (26 December 1742 – 29 August 1803) was a cleric, a playwright, and a poet. He is best known as a prolific librettist. Gamerra was born in Livorno, and worked from 1771 at the Teatro Regio Ducal in Milan – an important centre for opera at the time. Operas based on his librettos include Sarti's Medonte, re di Epiro and Josef Mysliveček's Il Medonte, Paisiello's Pirro, several operas by Antonio Salieri and Mozart's Lucio Silla (though this libretto was modified by Metastasio). His Erifile was set by several composers. De Gamerra is also said to have been the first translator of Mozart's Die Zauberflöte into Italian. His librettos are in the grand, orderly tradition of Metastasio, but incorporate progressive elements with enhanced use of chorus, ballet, and elaborate scene